package com.lanou3g.hw0517.common;

/**
 * 常量类
 */
public final class Constant {
    /*
    session相关
    内部类,在一个类里装着其他类
     */
    public static final class Session {
        public static final String USER = "username";
    }
    public static final class Request {
        public static final String MSG = "msg";
    }

}
